#	Programmer:	limodou
#	E-mail:		chatme@263.net
#
#	Copyleft 2004 limodou
#
#	Distributed under the terms of the GPL (GNU Public License)
#
#   NewEdit is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 2 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program; if not, write to the Free Software
#   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
#	$Id: mDosPrompt.py,v 1.1 2005/07/31 09:08:14 limodou Exp $

from modules import Mixin
import wx
import locale
import types
import os


def init(win):
	wx.EVT_IDLE(win, win.OnIdle)
	wx.EVT_END_PROCESS(win.mainframe, -1, win.mainframe.OnDosProcessEnded)
	wx.EVT_KEY_DOWN(win, win.OnKeyDown)
	wx.EVT_KEY_UP(win, win.OnKeyUp)
	wx.EVT_UPDATE_UI(win, win.GetId(),  win.RunCheck)

	win.MAX_PROMPT_COMMANDS = 25

	win.process = None
	win.pid = -1

	win.CommandArray = []
	win.CommandArrayPos = -1

	win.editpoint = 0
	win.writeposition = 0

	win.commandlen = 0
	win.firstread = 0
Mixin.setPlugin('dospromptwindow', 'init', init)

def RunDosCommand(win, command, guiflag=False, redirect=True):
	"""replace $file = current document filename"""
	if redirect:
		win.createDosWindow()

		win.panel.showPage(tr('Dos'))

		win.dosprompt.SetText('')
		win.dosprompt.editpoint = 0
		win.dosprompt.writeposition = 0
		try:
			win.dosprompt.process = wx.Process(win)
			win.dosprompt.process.Redirect()
			if guiflag:
				win.dosprompt.pid = wx.Execute(command, wx.EXEC_ASYNC|wx.EXEC_NOHIDE, win.dosprompt.process)
			else:
				win.dosprompt.pid = wx.Execute(command, wx.EXEC_ASYNC, win.dosprompt.process)
			win.dosprompt.inputstream = win.dosprompt.process.GetInputStream()
			win.dosprompt.errorstream = win.dosprompt.process.GetErrorStream()
			win.dosprompt.outputstream = win.dosprompt.process.GetOutputStream()
		except:
			win.dosprompt.process = None
			dlg = wx.MessageDialog(win, tr("There are some problems when running the program!\nPlease run it in shell.") ,
				"Stop running", wx.OK | wx.ICON_INFORMATION)
			dlg.ShowModal()
	else:
		wx.Execute(command)
Mixin.setMixin('mainframe', 'RunDosCommand', RunDosCommand)

def OnIdle(win, event):
	if win.process is not None:
		if win.inputstream:
			if win.inputstream.CanRead():
				text = win.inputstream.read()
				if win.commandlen > 0:
					if len(text) >= win.commandlen:
						text = text[win.commandlen:]
						win.commandlen = 0
					else:
						text = ''
						win.commandlen -= len(text)
				appendtext(win, text)
				win.writeposition = win.GetLength()
				win.editpoint = win.GetLength()
		if win.errorstream:
			if win.errorstream.CanRead():
				text = win.errorstream.read()
				appendtext(win, text)
				win.writeposition = win.GetLength()
				win.editpoint = win.GetLength()
Mixin.setMixin('dospromptwindow', 'OnIdle', OnIdle)

def OnKeyDown(win, event):
	keycode = event.GetKeyCode()
	pos = win.GetCurrentPos()
	if win.pid > -1:
		if (pos >= win.editpoint) and (keycode == wx.WXK_RETURN):
			text = win.GetTextRange(win.writeposition, win.GetLength())
			l = len(win.CommandArray)
			if (l < win.MAX_PROMPT_COMMANDS):
				win.CommandArray.insert(0, text)
				win.CommandArrayPos = -1
			else:
				win.CommandArray.pop()
				win.CommandArray.insert(0, text)
				win.CommandArrayPos = -1

			if isinstance(text, unicode):
				text = text.encode(locale.getdefaultlocale()[1])
			win.commandlen = len(text) + 1
			win.firstread = True

			win.outputstream.write(text + '\n')
			win.GotoPos(win.GetLength())

		if keycode == wx.WXK_UP:
			l = len(win.CommandArray)
			if (len(win.CommandArray) > 0):
				if (win.CommandArrayPos + 1) < l:
					win.GotoPos(win.editpoint)
					win.SetTargetStart(win.editpoint)
					win.SetTargetEnd(win.GetLength())
					win.CommandArrayPos = win.CommandArrayPos + 1
					win.ReplaceTarget(win.CommandArray[win.CommandArrayPos])

		elif keycode == wx.WXK_DOWN:
			if len(win.CommandArray) > 0:
				win.GotoPos(win.editpoint)
				win.SetTargetStart(win.editpoint)
				win.SetTargetEnd(win.GetLength())
				if (win.CommandArrayPos - 1) > -1:
					win.CommandArrayPos = win.CommandArrayPos - 1
					win.ReplaceTarget(win.CommandArray[win.CommandArrayPos])
				else:
					if (win.CommandArrayPos - 1) > -2:
						win.CommandArrayPos = win.CommandArrayPos - 1
					win.ReplaceTarget("")
	if ((pos > win.editpoint) and (not keycode == wx.WXK_UP)) or ((not keycode == wx.WXK_BACK) and (not keycode == wx.WXK_LEFT) and (not keycode == wx.WXK_UP) and (not keycode == wx.WXK_DOWN)):
		if (pos < win.editpoint):
			if (not keycode == wx.WXK_RIGHT):
				event.Skip()
		else:
			event.Skip()
Mixin.setMixin('dospromptwindow', 'OnKeyDown', OnKeyDown)

def OnKeyUp(win, event):
	keycode = event.GetKeyCode()
	#franz: pos was not used
	if keycode == wx.WXK_HOME:
		if (win.GetCurrentPos() < win.editpoint):
			win.GotoPos(win.editpoint)
		return
	elif keycode == wx.WXK_PRIOR:
		if (win.GetCurrentPos() < win.editpoint):
			win.GotoPos(win.editpoint)
		return
	event.Skip()
Mixin.setMixin('dospromptwindow', 'OnKeyUp', OnKeyUp)

def OnDosProcessEnded(win, event):
	if win.dosprompt.inputstream.CanRead():
		text = win.dosprompt.inputstream.read()
		appendtext(win.dosprompt, text)
	if win.dosprompt.errorstream.CanRead():
		text = win.dosprompt.errorstream.read()
		appendtext(win.dosprompt, text)

	if win.dosprompt.process:
		win.dosprompt.process.Destroy()
		win.dosprompt.process = None
		win.dosprompt.pid = -1
Mixin.setMixin('mainframe', 'OnDosProcessEnded', OnDosProcessEnded)

def appendtext(win, text):
	win.GotoPos(win.GetLength())
	if not isinstance(text, unicode):
		text = unicode(text, locale.getdefaultlocale()[1])
	win.AddText(text)
	win.GotoPos(win.GetLength())
	win.EmptyUndoBuffer()

def RunCheck(win, event):
	if (win.GetCurrentPos() < win.editpoint) or (win.pid == -1):
		win.SetReadOnly(1)
	else:
		win.SetReadOnly(0)
Mixin.setMixin('dospromptwindow', 'RunCheck', RunCheck)